Update Markdown exporter documentation.

jrnl/plugins/__init__.py

@@ -8,6 +8,7 @@ import importlib
 
 
 class PluginMeta(type):
+
     def __init__(cls, name, bases, attrs):
         """Called when a Plugin derived class is imported"""
         if not hasattr(cls, 'PLUGINS'):

jrnl/plugins/markdown_exporter.py

@@ -6,7 +6,7 @@ from .text_exporter import TextExporter
 
 
 class MarkdownExporter(TextExporter):
-    """This Exporter can convert entries and journals into json."""
+    """This Exporter can convert entries and journals into Markdown."""
     names = ["md", "markdown"]
     extension = "md"
 
@@ -27,7 +27,7 @@ class MarkdownExporter(TextExporter):
 
     @classmethod
     def export_journal(cls, journal):
-        """Returns a json representation of an entire journal."""
+        """Returns a Markdown representation of an entire journal."""
         out = []
         year, month = -1, -1
         for e in journal.entries: